1212211110139 has 2 divisors, whose sum is σ = 1212211110140. Its totient is φ = 1212211110138.

The previous prime is 1212211110137. The next prime is 1212211110259. The reversal of 1212211110139 is 9310111122121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1212211110139 - 2¹ = 1212211110137 is a prime.

Together with 1212211110137, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1212211110137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606105555069 + 606105555070.

It is an arithmetic number, because the mean of its divisors is an integer number (606105555070).

Almost surely, 2^{1212211110139} is an apocalyptic number.

1212211110139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212211110139 is an equidigital number, since it uses as much as digits as its factorization.

1212211110139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 25.

The spelling of 1212211110139 in words is "one trillion, two hundred twelve billion, two hundred eleven million, one hundred ten thousand, one hundred thirty-nine".